Use ably.com - it's not fun and reliable to use websockets yourself. Cloudflare offers a similar service. Or you can go for a full service like getstream.io or

Use ably.com - it's not fun and reliable to use websockets yourself. Cloudflare offers a similar service. Or you can go for a full service like getstream.io or cometchat.com The latter, I have found to require a lot upfront and have their own ways to do things. It's not bad if you are okay with it. They cost somewhat a lot but provide up to par service.